import json

def escape_json_string(json_string) :
    escaped_string = json.dumps(json_string)
    return escaped_string

if __name__ == "__main__":
    json_string = '{"functionIndicator": [{"functionMessageTriggerDescription": "123"}]}'
    escaped_json_string = escape_json_string(json_string)
    print('\n')
    print(escaped_json_string)
    print('\n')
    print('执行完成~')